Social — entry 035 of 39

Tumblr

Verified Jul 2026

Tumblr's REST API v2 covers blogs, posts, likes, follows, and queue/draft management, plus a newer Neue Post Format for structured content blocks. Reading most public blog data only needs a registered app's api_key, but posting, reblogging, or acting on a user's behalf requires OAuth authorization. Both OAuth 1.0a and OAuth 2.0 are documented as currently supported, including a dedicated token-exchange endpoint for apps migrating from the older flow to the newer one.

bloggingsocialmicrobloggingoauthpublishing
AuthenticationOAuthRequires an OAuth flow; expect app registration.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSONResponses can be requested as JSON.

GreatAPIs Score

Score57out of 100
Authentication8/25OAuth flow required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats9/15Single response format
Freshness20/20Verified within 6 months

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Scored 57 on greatapis.com
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Auth quickstart

  1. Register an app / run the OAuth flow to obtain a bearer token.
  2. Send it as an Authorization headerAuthorization: Bearer <token>
Stored keyNo key stored

Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.